lack of grunt

[staffie121]

Hi ya, Just got my G back on the road and everything seems ok but in top gear I seem to have no acceleration, can anyone point me in the right direction??

[PeteG40]

Boost leak?

[hayesey]

only in 5th gear?  You don't have an 8P fifth installed do you?

[staffie121]

can't find no air leaks and I aint got a clue what an 8p fifth is lol

[NeilG40]

I remember mine having a lack of go when the exhaust manifold gasket was leaking.